Стэк__

This company, Стэк__, is a Belarusian company active in the field of algorithms, specializing in the implementation of reverse Polish notation. Programming languages are used for stack operations to store information about which function or procedure was called, as well as stacks for other purposes. The name Стэк__ appears in various sources, including Wikipedia and a blog. The company is also known as СТЭК ПС ООО, which provides construction services and has its own architectural-project departments. The company's contact information includes a phone number (017) 211-00-77 and an email address (ps.stek@mail.ru), with an address listed as ul. Железнодорожная, 31/1-406, Минск. Another site mentions a review or opinion section for the company.